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检索条件"主题词=Algorithm simulation"

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Applying an Intrusion Detection algorithm to Wireless Sensor Networks

Applying an Intrusion Detection Algorithm to Wireless Sensor...

引用

2nd International Workshop on Knowledge Discovery Data Mining

作者： Wang, Qi Wang, Shu Meng, Zhonglou Huazhong Univ Sci & Technol Elect & Informat Engn Dept Wuhan 430074 Peoples R China

ISBN: (纸本)9780769535432

Although static sensor nodes have low computation and communication capabilities, they have specific properties, and can acquire stable neighboring nodes' information, which can be used for detection of anomalies in networking and behaviors of the neighbor nodes, thus providing security for Wireless sensor networks. In many attacks against sensor networks, the first step for an attacker is to impersonate itself as a legitimate node within the network. To make a sensor node capable of detecting an intruder, a simple dynamic statistical model of the neighboring nodes is needed to build, together with a low-complexity detection algorithm to monitor received packet power levels. A detection algorithm based on security scheme for Wireless sensor networks is introduced in this paper.

关键词： Wireless sensor networks intrusion detection algorithm abnormal receive power algorithm simulation

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Improvement of 2-D DOA Estimation Based on L-shaped Array

Improvement of 2-D DOA Estimation Based on L-shaped Array

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10th International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Cheng, Qiao Zhao, Yimin Yang, Jing Xidian Univ Sch Elect Engn Xian Peoples R China

ISBN: (纸本)9781467318006

This paper presents a novel algorithm for two-dimensional (2-D) direction finding based on L-shaped arrays. Firstly, by using the array geometries, four covariance matrices are obtained. Secondly, a particular big matrix constructed by the four covariance matrices is used to estimate the signal subspace. Finally, the direction of arriving angles can be achieved by 2-D ESPRIT algorithm. simulation results confirm that the proposed method, compared with the conventional methods, has higher estimation accuracy, low computation cost.

关键词： Direction of arrival estimation signal subspace Covariance matrix algorithm simulation arrays direction finding

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Time Delay Estimation algorithm of Closed Loop System Using Mathcad Package

Time Delay Estimation Algorithm of Closed Loop System Using ...

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2nd International Conference on Information and Computing Science

作者： Zerek, Amer R. Aldwaik, Mahmud O. Edwila, A. M. Safar, A. A. Acad Engn Elect & Elect Dept Libya Tajoura Libya Acad Grad Studies Dept Elect & Comp Engn Tripoli Libya

ISBN: (纸本)9780769536347

This paper deals with the closed loop system called Adaptive time delay estimation (ATDE) for estimating time delay between two signals is presented. The simulation of this algorithm accomplished by using MathCAD package are carried out. The technique that we will present this work is based on the error between two samples of the incoming signal the difference between the delayed signal and the reference signal passed through a known delay as performance index for the estimator. The algorithm adaptively controls the delay, so as to minimize the mean square of this error. Derivation of the algorithm is presented as well as several tests of different cases are carried out.

关键词： time delay algorithm simulation MSE ATDE MathCAD ATDE

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Direction-of-Arrival Estimation in a Clustered Channel Model

Direction-of-Arrival Estimation in a Clustered Channel Model

引用

10th IEEE International New Circuits and Systems Conference (NEWCAS)

作者： Vakilian, Vida Frigon, Jean-Francois Roy, Sebastien Ecole Polytech Dept Elect Engn Montreal PQ H3C 3A7 Canada Univ Laval Dept Elect & Comp Engn Quebec City PQ G1K 7P4 Canada

ISBN: (纸本)9781467308595

In this paper, we study the performance of the MUltiple SIgnal Classification (MUSIC) direction-of-arrival (DoA) estimation algorithm in a clustered channel model. We examine the effect of angular spread on the estimation accuracy of the MUSIC algorithm. simulation result shows that the performance of the MUSIC algorithm degrades as the angular spread increases. Furthermore, an experimental study is performed in an anechoic chamber to evaluate the performance of DoA estimation using a single reconfigurable antenna element known as Composite Right/Left Handed (CRLH) Leaky-Wave (LW) antenna that offers a high level of directivity with electronically controllable radiation patterns. Experimental results show that the DoA estimation technique succeeded in estimating the DoA using a single antenna element.

关键词： antenna element channel model Multiple signal classification Direction of arrival estimation angular spread Musical performances Anechoic chambers directivity Radiation patterns algorithm simulation

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Path-based multicasting in multicomputers

Path-based multicasting in multicomputers

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International Conference on Parallel and Distributed Computing and Networks

作者： Harutyunyan, H. Wang, S. Concordia Univ Dept Comp Sci Montreal PQ H3G 1M8 Canada

ISBN: (纸本)9780889866379

In this paper we present a path-based multicast routing algorithm for wormhole routed 2D mesh network. Next we present some properties and the time complexity of the new algorithm. Analysis of the algorithm shows that it significantly reduces the multicast time (by about 50% in 2D mesh) and slightly decreases (by 15% in 2D mesh) the multicast traffic over LIN's Hamiltonian path-based algorithm.

关键词： multicumputers multicasting path-based multicasting algorithm simulation

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Research of Inverted Index Method based on Block Organizing Technology

Research of Inverted Index Method based on Block Organizing ...

引用

3rd International Conference on Manufacturing Science and Engineering (ICMSE 2012)

作者： Yang, X. B. Zhejiang Univ Finance & Econ Dept Informat Hangzhou 310018 Zhejiang Peoples R China

ISBN: (纸本)9783037853696

In order to further improve the overall efficiency of retrieval system, it proposes a method of inverted index based on block organizing technology. The specific studying process is as follows. Firstly, retrieval performance model of inverted index is generated based on data statistics, and then analyze the organizational strategy of inverted file block index, finally, retrieval performance model is verified through simulation experiment. The result shows that the method of inverted file block organization can get higher algorithm efficiency under the condition of less cycle numbers in the search algorithm, and also reduce the execution time of search algorithm significantly, which can verify the feasibility of inverted file block index method.

关键词： retrieval performance model block organization inverted index algorithm simulation

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Analyzing Engagement Taxonomy in Collaborative algorithm Visualization

Analyzing Engagement Taxonomy in Collaborative Algorithm Vis...

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12th Annual Conference on Innovation and Technology in Computer Science Education

作者： Myller, Niko Laakso, Mikko Korhonen, Ari Univ Joensuu Dept Comp Sci & Stat FI-80101 Joensuu Finland

ISBN: (纸本)9781595936103

More collaborative use of visualizations is taking place in the classrooms due to the introduction of pair programming and collaborative learning as teaching and learning methods. This introduces new challenges to the visualization tools, and thus, research and theory to support the development of collaborative visualization tools is needed. We present an empirical study in which the learning outcomes of students were compared when students were learning in collaboration and using materials which contained visualizations on different, engagement levels. Results indicate that the level of engagement has an effect on students learning results although the difference is not statistically significant. Especially students without previous knowledge seem to gain more from using visualizations on higher engagement level.

关键词： algorithm Visualization algorithm simulation Collaborative Learning Engagement Taxonomy

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Solving NoC Mapping Problem with Improved Particle Swarm algorithm

Solving NoC Mapping Problem with Improved Particle Swarm Alg...

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6th International Conference on Advanced Computational Intelligence (ICACI)

作者： Li, Zhengxue Liu, Yang Cheng, Mingsong Dalian Univ Technol Sch Math Sci Dalian Peoples R China Huawei Technol Co Ltd Shenzhen Peoples R China

ISBN: (纸本)9781467363433

Network on chip (NoC) mapping problem belongs to quadratic assignment problem, and quadratic assignment problem is a classical combinatorial optimization problem which has been proved to be a NP-complete problem. In this paper, the widely used 2D-mesh as a NoC topology is studied, and the important factors influencing the performance of the system-power consumption and delay are modeled. Then the approximate optimal solution is found using the improved discrete particle swarm optimization algorithm. simulation experiments show that very good optimal results are obtained.

关键词： particle swarm algorithm Nondeterministic polynomial-time hard MAPPING(MATHEMATICAL) algorithm simulation System performance channel assignment problem network-on-chip Quadratic

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Information fusion-based Frequency Estimation of Multi-section Equal-length Signals with Known Frequency-shift

Information fusion-based Frequency Estimation of Multi-secti...

引用

7th World Congress on Intelligent Control and Automation

作者： Liu, Liangbing Tu, Yaqing Logist Engn Univ Dept Informat Engn Chongqing 400016 Peoples R China

ISBN: (纸本)9781424421138

Information fusion among multi-section sampled signals acquired by several measurements is helpful to frequency estimation, especially under the condition of low SNR and short duration of measured frequency. To improve precision of frequency estimation for multi-section sampled signals and extend applicable range of existing methods, a fusion method of multi-section equal-length signals with known frequency-shift is proposed. In the algorithm, some techniques such as parameter matrix for frequency-domain analysis, phase-difference compensating factor matrix, search frequency array and so on are provided to solve problems such as unequal measured frequencies, phase discontinuity among different section signals and so on. Four properties are given as mathematical justification of the method. Simulated experiments with different application environment parameters are carried out. They show that the algorithm is true of any type of multi-section equal-length signals with known frequency-shift. It has good noise immunity and its precision of frequency estimation is much higher than that of existing methods.

关键词： information fusion frequency estimation multi-section equal-length signals with known frequency-shift algorithm simulation

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The simulation of SINS Based on MEMS Inertial Sensors for Rolling Projectile

The Simulation of SINS Based on MEMS Inertial Sensors for Ro...

引用

2007国际机械工程与力学会议

作者： Ding LI Xiongzhu BU School of Mechanical Engineering Nanjing University of Science and Technology

Current development status and future development trend of MEMS inertial sensors are introduced in this paper firstly. A micro Strap-down Inertial Navigation System (SINS) with 3-axis micro accelerometer and 3-axis MEMS gyro is designed, and the SINS algorithm is simulated using MATLAB/SIMULINK. The simulation model of the Micro-inertial navigation system is established, and algorithm block diagram is also given, including the quaternion and flight parameter updating, the influence of the sensors' performance for the SINS accuracy is also analyzed. The input data of algorithm simulation platform would be all or partial output from the real MEMS inertial sensors or the projectile body in specific motion. The simulation results show that the algorithm is not only valid but also could be used to analyze the system function.

关键词： projectile MEMS inertial sensors Module of SINS algorithm simulation

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